more "no isinf on solaris" buglets (2.0.1)

[Will Partain]

Hi; in trying to build 2.0.1 on Solaris (2.6), I hit a few
more instances of the "no isinf on Solaris" problem which
you already know about.  Below are the changes I've made.
Keep up the good work,

Will

diff -ru1 ../lilypond-2.0.1/lily/beam.cc ./lily/beam.cc
--- ../lilypond-2.0.1/lily/beam.cc      2003-09-23 15:49:21.000000000 +0100
+++ ./lily/beam.cc      2003-09-30 19:31:44.057927000 +0100
@@ -43,2 +43,4 @@
 #include "warn.hh"
+//partain: for isinf
+#include "libc-extension.hh"
 
diff -ru1 ../lilypond-2.0.1/lily/grob.cc ./lily/grob.cc
--- ../lilypond-2.0.1/lily/grob.cc      2003-07-01 11:43:57.000000000 +0100
+++ ./lily/grob.cc      2003-09-30 19:45:12.788037000 +0100
@@ -30,2 +30,4 @@
 #include "ly-smobs.icc"
+//partain: for isinf
+#include "libc-extension.hh"
 
diff -ru1 ../lilypond-2.0.1/lily/lily-guile.cc ./lily/lily-guile.cc
--- ../lilypond-2.0.1/lily/lily-guile.cc        2003-09-28 21:44:35.000000000 
+0100
+++ ./lily/lily-guile.cc        2003-09-30 19:51:56.325567000 +0100
@@ -19,2 +19,5 @@
 
+//partain: moved up so isinf in the way:
+#include "libc-extension.hh"
+
 /* macosx fix:
@@ -29,3 +32,2 @@
 
-#include "libc-extension.hh"
 #include "lily-guile.hh"
diff -ru1 ../lilypond-2.0.1/lily/spaceable-grob.cc ./lily/spaceable-grob.cc
--- ../lilypond-2.0.1/lily/spaceable-grob.cc    2003-02-15 21:28:07.000000000 
+0000
+++ ./lily/spaceable-grob.cc    2003-09-30 20:20:07.012192000 +0100
@@ -17,2 +17,5 @@
 
+//partain: for isinf
+#include "libc-extension.hh"
+
 SCM
diff -ru1 ../lilypond-2.0.1/lily/spacing-spanner.cc ./lily/spacing-spanner.cc
--- ../lilypond-2.0.1/lily/spacing-spanner.cc   2003-09-28 21:45:41.000000000 
+0100
+++ ./lily/spacing-spanner.cc   2003-09-30 20:25:13.575860000 +0100
@@ -30,2 +30,5 @@
 
+//partain: for isinf
+#include "libc-extension.hh"
+
 class Spacing_spanner